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ONLINE POWER SYSTEM ANALYSIS

Your network.
Your first
insight.

Go from a single-line diagram to load flow, fault currents and protection studies. All in your browser.

Try SLD Studio Start with an example

No installation. An editable practice network to get you started.

NETWORK EXPLORERSLD → STUDY
From sources to a connected power network Illustrative single-line diagram with a square diagonally grated grid source, a generator, transformer, bus, motor and outgoing load. Not a calculated result. GRIDGENERATORTRANSFORMERGMMOTORLOADFEEDER ONE CONNECTED MODEL
01 Build02 Calculate03 Explore
Illustrative network · not a calculated study result
FROM THE FIRST BUS VOLTAGE TO THE NEXT OPERATING CASEExplore your studies

THREE WAYS TO UNDERSTAND YOUR NETWORK

Draw it once.
Ask better questions.

01 / LOAD FLOW

Where does
the power go?

Inspect bus voltages, branch currents and grid interchange. Change an operating case and compare the response.

Run your first load flow
02 / SHORT CIRCUIT

What happens
during a fault?

Explore fault locations and source conditions. Review bus fault current, branch contributions and equipment-duty findings.

Explore short circuit
03 / RELAY COORDINATION

Which protection
operates first?

Review relay settings and grading. Study breaker-opening sequences with the modeled CT data and trip connections.

Explore relay coordination

A STARTING POINT, ALREADY DRAWN

Skip the blank canvas.

Get hands-on with an editable training network. Follow the worksheet, inspect the equipment, then make it your own.

Grid + generatorsTransformers + busesMotors + protection

Teaching inputs are included. Some exercises deliberately expose failed or unresolved checks; the example is not an approved design.

YOUR PRACTICE KITEDITABLE MODEL + WORKSHEET

Meet your first network.

Download the model and keep the equipment-data worksheet beside your workspace.

Download practice network Open the equipment worksheet Full tutorial and course materials .zrsld.json · Opens in SLD Studio

YOUR FIRST LOAD FLOW

Open. Run.
Understand.

Start with one useful answer:
the voltage at a bus.

Open the workspace
  1. 01

    Open the practice model

    Save any existing drawing first. Download the practice file above, then use the workspace’s file-opening control to open it. Sign in when prompted for a study.

  2. 02

    Review the inputs. Run Load Flow.

    Check the operating case and equipment data against the worksheet. Resolve input messages and review the displayed ZCU requirement before running.

  3. 03

    Read the result in context

    Inspect a bus voltage, a branch current and grid active/reactive power. Read validation messages and assumptions alongside the numbers. Save the project and study report.

START EXPLORING

A little credit.
A practical first step.

New accounts receive a one-time allowance of 50 free ZCU. Open the workspace to check your project’s exact requirement.

ZCU are weighted units based on equipment and connections, not a count of studies. The complete training network may require additional ZCU.

50FREE ZCU
FOR NEW ACCOUNTS

Additional ZCU: ₹20 per ZCU

Try SLD Studio Allowance and price checked 7 October 2026.
Review the current requirement before paying.

PUT YOUR NEXT QUESTION ON THE DIAGRAM

See what your
network is telling you.

Start using SLD Studio

Use verified equipment data. Review suggested inputs, model assumptions and unresolved findings before relying on a result.